<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- 都是左布局实现的是float 是左右的
     -->
    <style>
        .a {
            width: 100px;
            height: 100px;
            background-color: red;
            float: left;
        }
        
        .b {
            width: 200px;
            height: 200px;
            background-color: blue;
            /* float: left; */
        }
    </style>
</head>

<body>
    <div class="a"> </div>
    <div class="b"> </div>


</body>

</html>